According to Osho, a mystic is one who knows but cannot say it; his truth is lived, felt in presence, glimpsed in a sudden gap of silence. When the mystic is also a master, he uses compassionate devices—indirect hints, situations—to transmit a taste of the unsayable. A mystery school is this living laboratory of transmission, relying on presence and skillful means rather than doctrines.
A mystic lives a truth you can feel more than hear, and a mystery school is where that truth is shared through presence and smart nudges, not explanations.